NEHRP Clearinghouse

National Science Foundation, Washington, D.C. Research Applied to National Needs.,
May 1975,
87 p.

Identifying Number(s)

MIT-CE-R75-23

Abstract

The primary data for this study come from 40-odd buildings in Los Angeles from which both information as to damage ratio and strong motion records were obtained during the San Fernando earthquake in 1971. A few additional buildings, in Managua and near Los Angeles, are added: for these additional buildings, all of which were heavily damaged during earthquakes, the general level of earthquake shaking can be inferred with reasonable confidence. Damage ratio is correlated with spectral displacement, spectral velocity, spectral acceleration (these spectral quantities were averaged over periods from 10% less than the pre-earthquake fundamental period to 10% greater than the during-earthquake period) and to calculated interstory displacement. The most useful correlations related damage ratio to spectral velocity and spectral accelerations.